Chapter 12 Applets and Advanced Graphics

Chapter 18 Applets and Multimedia

Motivations

• When browsing the Web, you frequently see the graphical user interface and animation developed using Java. These programs are called Java applets. Suppose you want to develop a Java applet for the Sudoku game. How do you write this program?

• Sudoku

Objectives

• To convert GUI applications to applets (§18.2).
• To embed applets in Web pages (§18.3).
• To run applets from Web browsers and from the appletviewer (§§18.3.1-18.3.2).
• To write a Java program that can run as both an application and an applet (§18.4).
• To override the init, start, stop, and destroy methods in the Applet class (§18.5).
• To pass string values to applets from HTML (§18.6).
• To develop an applet for the TicTacToe game (§18.7).
• To develop an animation for a bouncing ball (§18.8).
• To locate resources (images and audio) using the URL class (§18.9).
• To play audio in any Java program (§18.10).

Developing Applets

The HTML Tag

• code=classfilename.class
• width=applet_viewing_width_in_pixels
• height=applet_viewing_height_in_pixels
• [archive=archivefile]
• [codebase=applet_url]
• [vspace=vertical_margin]
• [hspace=horizontal_margin]
• [align=applet_alignment]
• [alt=alternative_text]
• >
• 
  

First Simple Applet

• code = "DisplayLabel.class"
• width = 350
• height = 200>